The shelves themselves are self-assembly heavy-duty white metal - bought from Big Dug several years ago. They have been attached to the wall for safety & being metal can have magnetic things attached. Really useful as you can position things where needed & to double up on space. I have some magnetic clips so that the library area can double up as as a display area. I can attach pieces of work to the shelves for looking at whilst working on (see below) as well as for viewing in different lighting conditions.